1 /*-
2 * Copyright (c) 1998 Mark Newton
3 * Copyright (c) 1994 Christos Zoulas
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.2/sys/compat/svr4/svr4_filio.c 302097 2016-06-23 00:30:09Z brooks $");
31
32 #include <sys/param.h>
33 #include <sys/proc.h>
34 #include <sys/systm.h>
35 #include <sys/capsicum.h>
36 #include <sys/file.h>
37 #include <sys/filio.h>
38 #include <sys/lock.h>
39 #include <sys/signal.h>
40 #include <sys/filedesc.h>
41 #include <sys/poll.h>
42 #include <sys/malloc.h>
43 #include <sys/mutex.h>
44
45 #include <sys/sysproto.h>
46 #include <sys/syscallsubr.h>
47
48 #include <compat/svr4/svr4.h>
49 #include <compat/svr4/svr4_types.h>
50 #include <compat/svr4/svr4_util.h>
51 #include <compat/svr4/svr4_signal.h>
52 #include <compat/svr4/svr4_proto.h>
53 #include <compat/svr4/svr4_ioctl.h>
54 #include <compat/svr4/svr4_filio.h>
55
56 /*#define GROTTY_READ_HACK*/
57
58 int
59 svr4_sys_poll(td, uap)
60 struct thread *td;
61 struct svr4_sys_poll_args *uap;
62 {
63 int error;
64 struct poll_args pa;
65 struct pollfd *pfd;
66 int idx = 0, cerr;
67 u_long siz;
68
69 if (uap->nfds > maxfilesperproc && uap->nfds > FD_SETSIZE)
70 return (EINVAL);
71
72 pa.fds = uap->fds;
73 pa.nfds = uap->nfds;
74 pa.timeout = uap->timeout;
75
76 siz = uap->nfds * sizeof(struct pollfd);
77 pfd = (struct pollfd *)malloc(siz, M_TEMP, M_WAITOK);
78
79 error = sys_poll(td, (struct poll_args *)uap);
80
81 if ((cerr = copyin(uap->fds, pfd, siz)) != 0) {
82 error = cerr;
83 goto done;
84 }
85
86 for (idx = 0; idx < uap->nfds; idx++) {
87 /* POLLWRNORM already equals POLLOUT, so we don't worry about that */
88 if (pfd[idx].revents & (POLLOUT | POLLWRNORM | POLLWRBAND))
89 pfd[idx].revents |= (POLLOUT | POLLWRNORM | POLLWRBAND);
90 }
91 if ((cerr = copyout(pfd, uap->fds, siz)) != 0) {
92 error = cerr;
93 goto done; /* yeah, I know it's the next line, but this way I won't
94 forget to update it if I add more code */
95 }
96 done:
97 free(pfd, M_TEMP);
98 return error;
99 }
100
101 #if defined(READ_TEST)
102 int
103 svr4_sys_read(td, uap)
104 struct thread *td;
105 struct svr4_sys_read_args *uap;
106 {
107 struct read_args ra;
108 cap_rights_t rights;
109 struct file *fp;
110 struct socket *so = NULL;
111 int so_state;
112 sigset_t sigmask;
113 int rv;
114
115 ra.fd = uap->fd;
116 ra.buf = uap->buf;
117 ra.nbyte = uap->nbyte;
118
119 if (fget(td, uap->fd, cap_rights_init(&rights, CAP_READ), &fp) != 0) {
120 DPRINTF(("Something fishy with the user-supplied file descriptor...\n"));
121 return EBADF;
122 }
123
124 if (fp->f_type == DTYPE_SOCKET) {
125 so = fp->f_data;
126 DPRINTF(("fd %d is a socket\n", uap->fd));
127 if (so->so_state & SS_ASYNC) {
128 DPRINTF(("fd %d is an ASYNC socket!\n", uap->fd));
129 }
130 DPRINTF(("Here are its flags: 0x%x\n", so->so_state));
131 #if defined(GROTTY_READ_HACK)
132 so_state = so->so_state;
133 so->so_state &= ~SS_NBIO;
134 #endif
135 }
136
137 rv = read(td, &ra);
138
139 DPRINTF(("svr4_read(%d, 0x%0x, %d) = %d\n",
140 uap->fd, uap->buf, uap->nbyte, rv));
141 if (rv == EAGAIN) {
142 #ifdef DEBUG_SVR4
143 struct sigacts *ps;
144
145 PROC_LOCK(td->td_proc);
146 ps = td->td_proc->p_sigacts;
147 mtx_lock(&ps->ps_mtx);
148 #endif
149 DPRINTF(("sigmask = 0x%x\n", td->td_sigmask));
150 DPRINTF(("sigignore = 0x%x\n", ps->ps_sigignore));
151 DPRINTF(("sigcaught = 0x%x\n", ps->ps_sigcatch));
152 DPRINTF(("siglist = 0x%x\n", td->td_siglist));
153 #ifdef DEBUG_SVR4
154 mtx_unlock(&ps->ps_mtx);
155 PROC_UNLOCK(td->td_proc);
156 #endif
157 }
158
159 #if defined(GROTTY_READ_HACK)
160 if (so) { /* We've already checked to see if this is a socket */
161 so->so_state = so_state;
162 }
163 #endif
164 fdrop(fp, td);
165
166 return(rv);
167 }
168 #endif /* READ_TEST */
169
170 #if defined(BOGUS)
171 int
172 svr4_sys_write(td, uap)
173 struct thread *td;
174 struct svr4_sys_write_args *uap;
175 {
176 struct write_args wa;
177 struct file *fp;
178 int rv;
179
180 wa.fd = uap->fd;
181 wa.buf = uap->buf;
182 wa.nbyte = uap->nbyte;
183
184 rv = write(td, &wa);
185
186 DPRINTF(("svr4_write(%d, 0x%0x, %d) = %d\n",
187 uap->fd, uap->buf, uap->nbyte, rv));
188
189 return(rv);
190 }
191 #endif /* BOGUS */
192
193 int
194 svr4_fil_ioctl(fp, td, retval, fd, cmd, data)
195 struct file *fp;
196 struct thread *td;
197 register_t *retval;
198 int fd;
199 u_long cmd;
200 caddr_t data;
201 {
202 struct filedesc *fdp = td->td_proc->p_fd;
203 struct filedescent *fde;
204 int error, num;
205
206 *retval = 0;
207
208 switch (cmd) {
209 case SVR4_FIOCLEX:
210 FILEDESC_XLOCK(fdp);
211 fde = &fdp->fd_ofiles[fd];
212 fde->fde_flags |= UF_EXCLOSE;
213 FILEDESC_XUNLOCK(fdp);
214 return 0;
215
216 case SVR4_FIONCLEX:
217 FILEDESC_XLOCK(fdp);
218 fde = &fdp->fd_ofiles[fd];
219 fde->fde_flags &= ~UF_EXCLOSE;
220 FILEDESC_XUNLOCK(fdp);
221 return 0;
222
223 case SVR4_FIOGETOWN:
224 case SVR4_FIOSETOWN:
225 case SVR4_FIOASYNC:
226 case SVR4_FIONBIO:
227 case SVR4_FIONREAD:
228 if ((error = copyin(data, &num, sizeof(num))) != 0)
229 return error;
230
231 switch (cmd) {
232 case SVR4_FIOGETOWN: cmd = FIOGETOWN; break;
233 case SVR4_FIOSETOWN: cmd = FIOSETOWN; break;
234 case SVR4_FIOASYNC: cmd = FIOASYNC; break;
235 case SVR4_FIONBIO: cmd = FIONBIO; break;
236 case SVR4_FIONREAD: cmd = FIONREAD; break;
237 }
238
239 #ifdef SVR4_DEBUG
240 if (cmd == FIOASYNC) DPRINTF(("FIOASYNC\n"));
241 #endif
242 error = fo_ioctl(fp, cmd, (caddr_t) &num, td->td_ucred, td);
243
244 if (error)
245 return error;
246
247 return copyout(&num, data, sizeof(num));
248
249 default:
250 DPRINTF(("Unknown svr4 filio %lx\n", cmd));
251 return 0; /* ENOSYS really */
252 }
253 }
254
255 int
256 svr4_pipe(struct thread *td, struct svr4_pipe_args *uap) {
257 int error;
258 int fildes[2];
259
260 error = kern_pipe(td, fildes, 0, NULL, NULL);
261 if (error)
262 return (error);
263
264 td->td_retval[0] = fildes[0];
265 td->td_retval[1] = fildes[1];
266
267 return (0);
268 }
269
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